EulerSwap

EthereumRegistered

A Uniswap v4 hook implementing a custom AMM backed by Euler vaults. In beforeSwap, it takes input tokens from the PoolManager, deposits them into an Euler vault, withdraws output tokens from another vault, verifies a custom bonding-curve invariant, and returns a BeforeSwapDelta — bypassing Uniswap's internal liquidity entirely. Each pool instance is deployed as a delegatecall proxy of this implementation.

0x8bd689f43ce0ef2a3fa98cc0054b1784866528a8 First pool 10 Sept 2025View on explorer

CBe carefulRegistry marks it upgradeable

Pools

Dynamic-fee pools

Last new pool

14mo

Code size

438 B

What it can do

Runs code on every swap

Its code executes inside each trade in pools that use it.

Can take tokens from swaps

It can take or add tokens during a swap. Fees, burns and custom curves work this way, and so do scams.

Gates who can add liquidity

It checks every deposit before it goes in.

Runs at pool creation

It runs when a pool is created, often to lock in that pool’s settings.

Handles donations to LPs

It runs when someone donates tokens to the pool’s LPs.

Safety report

Automated checks, not an audit

✓Not upgradeableNo proxy pattern found: the code is fixed.

!Registry marks it upgradeableUniswap’s registry lists this hook as upgradeable.

✓Listed in Uniswap’s hook registryRegistered with Uniswap Labs (a listing, not a security review).

✓Source code verifiedPublished source matches the deployed code.

iCan change swap amountsIt has a ReturnDelta permission. Normal for fees and burns, but also how fake-quote hooks steal.

?No audit linkedAutomated checks only.

Pools using this hook

1 total

PairCreatedFeePool ID

0x35d8…9bc0 / 0x73a1…acf5 14mo 0.001% 0x7cb3…f66c Tx ↗